Finite element analysis examines stress distribution in miniscrews at varying insertion angles, suggesting optimal practices for orthodontics.
Key Points
This research aims to evaluate how different insertion angles of miniscrews affect stress distribution and micromotion using finite element analysis.
Finite element analysis was conducted on 225 mandibular models from cone beam computed tomography scans.
Titanium alloy miniscrews were inserted at 30°, 45°, 60°, and 90° angles with loads of 2 N and 5 N applied.
Stress, displacement, and micromotion were analyzed, and data were statistically evaluated.
Insertion at 45° resulted in the lowest von Mises stress of 61.2 MPa and minimal micromotion of 0.033 mm.
Significant effects of insertion angle on stress were observed (P < 0.001), with regression analysis showing strong predictors of stress and micromotion (adjusted R² = 0.89).
The highest odds of failure were at 90° and 30° insertion angles, with optimal insertion at 45° reducing risk.